Question:

Complete the given equations : (i) $Cu + 8HNO_3 \to 3Cu(NO_3)_2 +$ $+ 4H_2O$ (ii) $4Zn +10HNO_3 \to 4Zn(NO_3)_2 + 5H_2O+$ (iii) $I_2 + 10HNO_3 \to$ $+ 10NO_2 + 4H_2O$

Updated On: Jul 6, 2022
  • a
  • b
  • c
  • d
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The Correct Option is B

Solution and Explanation

(i) $ {3Cu +8HNO3_{(dil).}->3Cu(NO3)2}+$ $\underset{\text{(W)}}{ {2NO}} {+4H2O}$ (ii) $ {4Zn +}$$\underset{\text{(very dilute)}}{ {10HNO3}}$ $ {(5\%)-> 4Zn(NO3)2 +5H2O \,+}$ $\underset{\text{(X)}}{ {N2O}}$ (iii) $ {I2 +10HNO3 ->}$ $\underset{\text{(Y)}}{ {2HIO3}}$$ {+\,10NO2 +4H2O}$
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Concepts Used:

P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: